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All questions of Fibre to Fabric (Old Syllabus) for Class 6 Exam

Which one of the following is not an example of natural fibre?
  • a)
    Rayon
  • b)
    Cotton
  • c)
    Wool
  • d)
    Silk
Correct answer is option 'A'. Can you explain this answer?

Rithika Roy answered
Silk, cotton and wood are obtained from natural sources either plant or animal but rayon is a synthetic fibre.

Q.Silkworms feeds on leaves of
a)Guava
b)Mulberry
c)Banana
d)Mango
Correct answer is option 'B'. Can you explain this answer?

Kavya Rane answered
Silkworms can ONLY survive on mulberry leaves (genus Morus), sometimes Osage orange (Maclura pomifera) or silkworm food, which is made from mulberry leaves. Your worms may eat other types of vegetation, such as lettuce leaves, but it will kill them.

Silk thread is obtained from
  • a)
    Cocoon
  • b)
    Caterpillar
  • c)
    Pupa
  • d)
    Adult moth
Correct answer is option 'A'. Can you explain this answer?

Meera Reddy answered
The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity (sericulture).

Which one is a type of synthetic fibre?
  • a)
    Nylon
  • b)
    Silk
  • c)
    Cotton
  • d)
    Jute
Correct answer is option 'A'. Can you explain this answer?

Jaya Kumar answered
Cotton, silk and jute are natural fibres obtained from plant and animals. Nylon is a synthetic fibre manufactured by human beings.

When silk was first produced in china?
  • a)
    2696 B.C
  • b)
    2000 B.C
  • c)
    4000 B.C
  • d)
    300 B.C
Correct answer is option 'A'. Can you explain this answer?

Abhiram Roy answered
Silk fabric was invented in Ancient China and played an important role in their culture and economy for thousands of years. Legend has it that the process for making silk cloth was first invented by the wife of the Yellow Emperor, Leizu, around the year 2696 BC.

The process of removal of fleece from the body of sheep is called
  • a)
    Cleaning
  • b)
    Carding
  • c)
    Shearing
  • d)
    Removal
Correct answer is 'C'. Can you explain this answer?

Sheep shearing is the process by which the woollen fleece of a sheep is cut off. The person who removes the sheep's wool is called a shearer. Typically each adult sheep is shorn/sheared once each year.
The annual shearing most often occurs in a shearing shed, a facility especially designed to process often hundreds and sometimes more than 3,001 sheep per day.

Sheep are shorn in all seasons, depending on the climate, management requirements and the availability of a woolclasser and shearers.

Which is not a synthetic fibre?
  • a)
    Rayon
  • b)
    Polyester
  • c)
    Hemp
  • d)
    Nylon
Correct answer is option 'C'. Can you explain this answer?

Sneha Khanna answered
Nylon, polyester and rayon are synthetic fibre manufactured by human beings. Hemp is used as fibre, oil and seed.

Science of rearing silk is called
  • a)
    Tissue culture
  • b)
    Sericulture
  • c)
    Agriculture
  • d)
    apiculture
Correct answer is 'B'. Can you explain this answer?

Nisha bajaj answered
Introduction:
The science of rearing silk is called sericulture. It involves the cultivation of silkworms, their feeding, and the extraction of silk from their cocoons. Sericulture has been practiced for thousands of years and is an important industry in many countries, including China, India, and Japan.

Process of Sericulture:
Sericulture involves several steps that are necessary for the successful production of silk. These steps can be broadly categorized into the following:

1. Selection of Silkworm Eggs: High-quality silkworm eggs are selected for rearing. These eggs are obtained from healthy and disease-free silkworms.

2. Feeding the Silkworms: The selected eggs are hatched, and the larvae, known as silkworms, are fed a diet consisting mainly of mulberry leaves. The mulberry leaves provide the necessary nutrition for the silkworms to grow and develop.

3. Mounting the Silkworms: The silkworms are mounted on bamboo trays or racks, where they continue to feed on mulberry leaves. They molt several times during their growth stage, shedding their skin and increasing in size.

4. Spinning Cocoons: After reaching the desired size, the silkworms stop feeding and start spinning cocoons. They produce silk threads from their salivary glands and wrap them around themselves to form the cocoon. The spinning process can take several days.

5. Harvesting the Cocoons: Once the silkworms have completed spinning the cocoons, the cocoons are carefully harvested. This is usually done by boiling the cocoons in hot water to kill the silkworms and loosen the silk threads.

6. Extracting Silk: The silk threads are carefully unwound from the cocoons. Several threads are combined to form a single silk thread, which is then wound onto reels. The silk thread can be further processed to remove impurities and improve its quality.

Importance of Sericulture:
Sericulture is an important industry for several reasons:

1. Economic Significance: Silk production is a valuable industry, providing employment and income for many people. It contributes to the economy of the countries where it is practiced.

2. Traditional Craft: Sericulture is often a part of the cultural heritage of a region. It has been practiced for centuries and is passed down through generations, preserving traditional knowledge and skills.

3. Environmental Benefits: Mulberry trees, which are the main food source for silkworms, help in soil conservation and provide shade. Sericulture promotes the cultivation of mulberry trees, which have positive environmental impacts.

4. Textile Industry: Silk is a luxurious and highly sought-after fabric. It is used in the production of high-quality textiles, garments, and accessories. Sericulture ensures a steady supply of silk for the textile industry.

Conclusion:
Sericulture is a complex and scientific process that involves the rearing of silkworms and the extraction of silk. It is an important industry with economic, cultural, and environmental significance. The science of sericulture plays a crucial role in the production of silk and contributes to the textile industry

Silk is a natural __________ fibre.
  • a)
    Fatty acids
  • b)
    Mixed
  • c)
    Cellulose
  • d)
    Protein
Correct answer is option 'D'. Can you explain this answer?

Kunal Mehra answered
Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons.

Scientific name of mulberry silk moth is
  • a)
    Bombyx biti
  • b)
    Bombyx lurra
  • c)
    Bombyx mori
  • d)
    Bombyx silki
Correct answer is option 'C'. Can you explain this answer?

Geetika Shah answered
In Africa, the commonly occurring silkworm species is the Bombyx mori. This species belongs to the Class; Insecta, Order: Lepidoptera, family: Bombycidae, genus: Bombyx. The Latin species name Bombyx mori means silkworm of the mulberry tree. A name that characteristically defines this worm species as it feeds mainly on the mulberry tree leaves during one of its critical lifecycles. This particular species is the best producing silkworm and due to centuries of domestication, this species is no longer found in the wild and has even lost its natural instinct to fend for itself in the wild.

Given below are two groups of materials used to make dress articles.
On what basis these have been grouped?
  • a)
    Leather
  • b)
    Synthetic
  • c)
    Natural
  • d)
    None of these
Correct answer is option 'C'. Can you explain this answer?

Both the groups belong to natural fiber category but differ in their source of extraction. Jute and cotton are obtained from their respective plants and wool, silk, leather are obtained from animals.

Cloths do not protect us against
  • a)
    Cold
  • b)
    Rain
  • c)
    Heat
  • d)
    Disease
Correct answer is option 'D'. Can you explain this answer?

Meera Reddy answered
Correct answer is (d)
Clothing (also known as clothes and attire) is fibre and textile material worn on the body. ... Clothes can insulate against cold or hot conditions. Further, they can provide a hygienic barrier, keeping infectious and toxic materials away from the body. Clothing also provides protection.

Silk yarn is as strong as
  • a)
    Steel
  • b)
    Wool
  • c)
    Copper wire
  • d)
    Cotton
Correct answer is option 'A'. Can you explain this answer?

Sanjana Kumar answered
SILK
Silk fibres are also animal fibres. Silkworms spin the ‘silk fibres’. The rearing of silkworms for obtaining silk is called sericulture. Find out from your mother/aunt/grandmother the kind of silk saris they have.It is solid as steel.

Science of rearing silk is called
  • a)
    Tissue culture
  • b)
    Sericulture
  • c)
    Agriculture
  • d)
    apiculture
Correct answer is option 'B'. Can you explain this answer?

Jaya Mukherjee answered
The science of rearing silk is called sericulture. Sericulture includes rearing, processing and reeling the silk.

Silk moth that contain silk is called
  • a)
    hub
  • b)
    mulberry
  • c)
    reel
  • d)
    cocoon
Correct answer is option 'D'. Can you explain this answer?

Gauri Basak answered
The silk moth that contains silk is called cocoon. Silk threads are wrapped on the body of silk larva to form cocoon.

The process of obtaining silk fibre from cocoons is called
  • a)
    Reeling
  • b)
    Yarning
  • c)
    Shearing
  • d)
    Carding
Correct answer is option 'A'. Can you explain this answer?

Alekhya jain answered
Obtaining Silk Fibre from Cocoons

Reeling:
Reeling is the process of obtaining silk fibre from cocoons. The cocoons are first sorted according to color, size, and texture. Then they are boiled in hot water to soften the sericin, a protein that holds the silk fibers together.

Unwinding:
After boiling, the softened cocoons are unwound carefully to obtain the silk fibres. The end of each filament is located and attached to a reel, which rotates to unwind the silk strands.

Single Strand:
As the cocoons are unwound, the individual silk filaments are twisted together to form a single strand of silk. This process requires skill and precision to ensure the quality of the silk fibre.

Cleaning and Drying:
Once the silk fibres are obtained, they are cleaned to remove any impurities and dried to prepare them for further processing. The cleaned silk fibres are then ready to be spun into yarn or used for weaving.

Conclusion:
The process of reeling silk fibre from cocoons is a meticulous and labor-intensive process that requires expertise and attention to detail. The resulting silk fibres are highly valued for their softness, sheen, and strength, making them a sought-after material for luxurious fabrics and textiles.

A In which process fleece of sheep with skin is/are removed?
  • a)
    Shaving              
  • b)
    Refining             
  • c)
    Shearing              
  • d)
    All of the above
Correct answer is option 'C'. Can you explain this answer?

Akash Unni answered
Process of Removing Fleece from Sheep Skin


The process of removing the fleece from the skin of a sheep is called shearing. Shearing is a common practice in the wool industry and is done to obtain the wool for various purposes such as clothing, textiles, and other products.


Shearing Process


Shearing involves the careful and systematic removal of the fleece from the sheep's body. It is typically performed by skilled professionals known as shearers, who use specialized tools like shearing machines or hand shears for the process.


The shearing process can be broken down into the following steps:



  • The sheep is restrained in a specific position to ensure safety and ease of shearing.

  • The shearers start by carefully removing the wool with the help of their tools. They move around the sheep, systematically shearing the fleece from different parts of the body.

  • The fleece is removed in one piece, starting from the belly and moving up towards the back. The shearers take care to avoid cutting or injuring the sheep's skin during the process.

  • Once the fleece is completely removed, it is carefully rolled or folded to maintain its quality and prevent any damage.



Purpose of Shearing


Shearing is a necessary process for several reasons:



  • Wool Harvest: Shearing allows the collection of wool from the sheep, which is a valuable natural fiber used in various industries.

  • Hygiene and Health: Regular shearing helps maintain the health and hygiene of the sheep. It prevents the accumulation of dirt, parasites, and excessive heat that can be detrimental to their well-being.

  • Preparation for the Next Season: Shearing also prepares the sheep for the upcoming seasons by allowing their new wool to grow properly.



Conclusion


In conclusion, shearing is the process of removing the fleece from the skin of a sheep. It is an essential practice in the wool industry to obtain wool for various purposes. Shearers carefully and systematically remove the fleece while ensuring the safety and well-being of the sheep. Shearing helps maintain hygiene, health, and prepares the sheep for the next season. Therefore, the correct answer to the question is option 'C' - Shearing.

Which of the following is the function of hair?
  • a)
    Traps a lot of air
  • b)
    Protects internal organs
  • c)
    Keeps body cool
  • d)
    Gives beauty
Correct answer is option 'A'. Can you explain this answer?

 Hairs (or pili; pilus in the singular) are characteristic of mammals. The functions of hair include protection, regulation of body temperature, and facilitation of evaporation of perspiration; hairs also act as sense organs.

Which of the following is formed as the small fluffy fibres of wool?
  • a)
    Bolls                                     
  • b)
    Burrs   
  • c)
    Reels                   
  • d)
    Combs
Correct answer is option 'B'. Can you explain this answer?

Answer:

The small fluffy fibers of wool are formed as burrs.

Explanation:

Wool is the natural fiber obtained from the fleece of sheep or other animals like goats, llamas, and rabbits. It is commonly used to make warm clothing, blankets, and other textile products. The process of obtaining wool involves several steps, including shearing, sorting, cleaning, and spinning.

When sheep graze in fields or pastures, they often come into contact with plants that have burrs. Burrs are small, prickly seed capsules that are covered in tiny hooks. These hooks easily attach to the fibers of the sheep's fleece as they brush against the plants.

Formation of Small Fluffy Fibers:
When the sheep's fleece is sheared, the burrs remain attached to the wool. During the subsequent steps of sorting and cleaning, the burrs are removed from the fleece. However, while removing the burrs, the fibers around them get tangled and form small fluffy clusters. These clusters are the small fluffy fibers of wool that are formed due to the presence of burrs.

Importance of Removing Burrs:
It is essential to remove the burrs from the wool because they can cause discomfort to the wearer and affect the quality of the final product. The presence of burrs can make the wool itchy and uncomfortable to wear. Additionally, burrs can also damage the spinning equipment and affect the quality of the spun yarn.

Conclusion:
In conclusion, the small fluffy fibers of wool are formed as burrs. These burrs attach to the sheep's fleece when they come into contact with plants in the fields or pastures. While removing the burrs during the sorting and cleaning process, the fibers around them get tangled and form small fluffy clusters. It is important to remove the burrs to ensure the comfort and quality of the wool.

Angora goats are found in
  • a)
    Delhi and U.P
  • b)
    Jammu and Kashmir
  • c)
    Punjab and Goa
  • d)
    Arunachal Pradesh and Karnataka
Correct answer is option 'B'. Can you explain this answer?

Meera Reddy answered
Rearing of goats is a traditional vocation in Jammu & Kashmir.
Angora goats are reared in Ladakh division and are known for production of Mohair a fine quality fiber which is used by local people in Ladakh for making Woolen garments after mixing it with sheep wool.

Goat is mainly reared for meat, milk & fiber (Pashmina and Mohair), hide and skin. Besides hide and  hair, intestine serve as basic raw materials for many processing industries, of which leather is the most important and accounts for sizeable employment and  even export earnings.

Which of the following species is most common silk moth?
  • a)
    Mooga silk
  • b)
    Mulberry silk
  • c)
    Tussar silk
  • d)
    Kosa silk
Correct answer is option 'A'. Can you explain this answer?

The Correct answer is b.
The most common silk moth is mulberry silk moth and its silk fibres are soft, lustrous, and elastic and can be dyed in beautiful colors.

Boiling of cocoon is done to
  • a)
    Strengthen the silk
  • b)
    Break the cocoon
  • c)
    Kill the pupa
  • d)
    Breed the pupa
Correct answer is option 'C'. Can you explain this answer?

It is necessary to boil the cocoon and kill pupa because to make a continues thread of silk we need to kill it otherwise pupa grows and break the cocoon and we will not get a continues thread.

The industry related to fabric and clothing is called
  • a)
    Fabric industry
  • b)
    Agro industry
  • c)
    Textile industry
  • d)
    Petrochemical industry
Correct answer is option 'C'. Can you explain this answer?

Shilpa Das answered
Textile is a fabric that's knitted or woven and made from yarn. Thus, the textile industry is the industry responsible for taking a raw material, like cotton or wool, and spinning it into yarn that is later used to create a fabric.

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